Hello,
I installed BOINC for Solaris 10 from http://www.dotsch.de/boinc/BOINC%20Clients.html
I'm running on OpenSolaris B122
I followed the installation guide:

3. Register your Account for seti@home
- The standard registration (attachment) mechanism within the boinc client (
./boinc_client -attach_project setiweb.berkeley.edu $ACCOUNT_KEY)
After the registratioon has finished, stop the BOINC client and start it again
with : "./boinc_client -update_prefs http://setiathome.berkeley.edu" or
./boinc_cmd -project http://setiathome.berkeley.edu update"
- Or, alternative this workaround helps to attach to a project :
Change $ACCOUNT_KEY in the file /opt/boinc/account_setiathome.berkeley.edu.xml
in the key you get from email from the seti@home project.
Edit line 3, and do not set any blanks before or after the key.
<account>
<master_url>http://setiathome.berkeley.edu/</master_url>
<authenticator>$ACCOUNT_KEY</authenticator>
<project_name>SETI@home</project_name>
<host_venue>home</host_venue>
<project_preferences>
</project_preferences>
</account>

Seti doesn't have its own application for your operating system, so you will have to tell BOINC to use one. You do that with one of the anonymous platform Seti@Home application files. (scroll down, use the correct one for your OS, open it up and read its install.seti file for more information). Jord

Ancient Astronaut Theorists can tell you that I do not help with tech questions via private message. Please use the forums for that.

The attachment is OK, but it looks like the SETI application is not installed or installed right. The BOINC client did not find the app_info.xml and so does not use the seperate SETI application...
The file app_info.xml and setiathome-5... must been installed in your case in /export/home/tester/Desktop/opt/boinc/projects/setiathome.berkeley.edu.

No, the BOINC client does not do any computing. It would be done by the science application (setiathome-5...), which should use nearly about 100% CPU per core in top or psrstat.

The installation is not completed. You need a update and a restart of the BOINC client. Please stop the BOINC client again, and start it again with "./boinc_client --update_prefs http://setiathome.berkeley.edu"

Now I'm testing boinc client and seti project with older version:
SETI@home 5.28, BOINC Client 5.10.45
and it works! on SunBlade 2500 on OpenSolaris build 122
So I guess, BOINC Client 6.2.19 is buggy for Solaris.
Thank you for help!

After better investigation, I must say that just SPARC machines works. I tried 3 x86 machines and none of them got task.
Maybe this is a reason:
[SETI@home] Message from server: platform 'i386-pc-solaris' not found

Now I'm testing boinc client and seti project with older version:
SETI@home 5.28, BOINC Client 5.10.45
and it works! on SunBlade 2500 on OpenSolaris build 122
So I guess, BOINC Client 6.2.19 is buggy for Solaris.
Thank you for help!

It's a well known problem with the BOINC client on Solaris. If the client would be started with the option "--no_gui_rpc" it would work. I have not found and solution for this problem.